The semi-auto version of the famous Scorpion EVO 3 A1, the EVO 3S1 is a awesome firearm for the range and as a home defense firearm.

Finally available for public consumption is the much anticipated
Scorpion sub-gun. Imported as a pistol, it is a blowback-operated
semi-auto in 9mm with a short 7¾” barrel. Equipped with our newly
designed low-profile sights, its rear sight has four different aperture
sizes for everything from close quarters to way out there. The sights
ride on an 11” Picatinny rail perfect for mounting optics.

This model ships with a barrel featuring a 1/2x28 thread pitch for use with the most common suppressors and muzzle devices on the market.